Smtp Penetration Testing

What it does

This skill enables AI agents to perform automated SMTP penetration testing, identifying vulnerabilities in email server configurations and protocols. It specifically targets weaknesses such as open relays, unauthenticated relay access, and improper authentication mechanisms to assess security posture.

When to use it

• Conducting pre-deployment security audits for new email infrastructure or migration projects.
• Validating the effectiveness of existing firewall rules and spam filtering policies against known attack vectors.
• Simulating phishing campaign delivery paths to ensure internal systems can detect unauthorized relay attempts.
• Performing compliance checks for organizations required to demonstrate robust email security controls.

Key capabilities

• Automated scanning of SMTP ports (25, 465, 587) across target IP ranges.
• Detection of open relay configurations allowing unauthenticated message forwarding.
• Identification of weak or missing authentication protocols like STARTTLS and ESMTP-AUTH.
• Reporting on specific vulnerability types including buffer overflows and command injection risks in mail handlers.

Example prompts

• "Scan the SMTP server at 192.0.2.1 for open relay vulnerabilities and report findings."
• "Test our email gateway against common authentication bypass techniques and list any weak points found."
• "Perform a non-intrusive penetration test on port 587 to check for improper TLS implementation."

Tips & gotchas

Ensure you have explicit written authorization before scanning any external IP addresses, as unauthorized SMTP testing is illegal in most jurisdictions. Limit scan intensity during business hours to avoid disrupting legitimate email traffic or triggering false-positive intrusion detection alerts.